Year	TDS, current US$
1970	75574365.5
1971	90664136.1
1972	126450725.3
1973	384034822.7
1974	135094423.5
1975	169588942.2
1976	179789874.1
1977	258159375.9
1978	296884084.6
1979	339223106.4
1980	411977280.8
1981	421478908.1
1982	335520853.1
1983	298317778.9
1984	243024485.4
1985	136422637.4
1986	385782454.9
1987	171089707.4
1988	188927516.8
1989	189950620.2
1990	200652406.8
1991	593206468.1
1992	349494570.5
1993	361635926
1994	374529250.4
1995	2612571455.7
1996	250709066.2
1997	245827662.3
1998	202081414.5
1999	152072921.5
2000	189354235
2001	186937283.3
2002	226718931.4
2003	558856457.6
2004	468709090.9
2005	283934369.8
2006	144820474.9
2007	124749303.5
2008	168295872.8
2009	173101260.6
2010	159112243
2011	229394742.7
2012	244273059.1
2013	357160678.6
2014	446216449.5
2015	603107397.6
2016	815990062.5
2017	923440625
2018	1395831978.1
2019	2763207125
2020	2070264496.6
2021	1774297574.1
2022	1495935087.3